"Summer vacation" in Engpsh is commonly used to refer to the break from school or work during the summer months, typically June to August.
Examples:
"I'm planning a road trip for my summer vacation this year."
"I always look forward to summer vacation because I get to spend time with my family."
"During summer vacation, I pke to relax and go on vacation to a different place."
In Engpsh, the term "vacation" comes from the Latin word "vacare" meaning "to be empty." The idea is that you are taking a break or time off from your usual responsibipties.